On 2016-02-14, Matthieu Herrb <matth...@herrb.eu> wrote:
> I've taken the list of individual optimisation from gcc(1) for both -O1
> and -O2 and replaced -O2 by this in CFLAGS.
gcc-local(1) is also worth a look...
> +O2= ${O1} -fthread-jumps -fcrossjumping \
> + -foptimize-sibling-calls -fcse-follow-jumps -fcse-skip-blocks \
> + -fgcse -fgcse-lm -fexpensive-optimizations -frerun-cse-after-loop \
> + -fcaller-saves -fpeephole2 -fschedule-insns -fschedule-insns2 \
> + -fsched-interblock -fsched-spec -fregmove -fstrict-aliasing \
> + -fstrict-overflow -fdelete-null-pointer-checks -freorder-blocks \
> + -freorder-functions -falign-functions -falign-jumps -falign-loops \
> + -falign-labels -ftree-vrp -ftree-pre
Our -O2 does not include -fstrict-aliasing, -fstrict-overflow,
-ftree-vrp.
--
Christian "naddy" Weisgerber na...@mips.inka.de
